subdivision [Facsimiles] under headings or subdivisions designating types of printed or written materials, documents, etc., e.g. [Autographs--Facsimiles; Incunabula--Facsimiles; Maps--Facsimiles; Newspapers--Facsimiles; Shakespeare, William, 1564-1616--Manuscripts--Facsimiles; United States--Maps--Early works to 1800--Facsimiles]